Math, asked by tridib50, 8 months ago

Hey..... plz help.... ​

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Answered by sayali02
1

Answer:

this is your answer.............

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Answered by Anonymous
31

{ \tt{ \huge{Question \colon}}}

 { \rm{{\dfrac{cos \: A}{1 - tan \: A} +  \dfrac{sin \: A}{1 - cot  \: A} = sin \:A \:  + cos \: A}}}

{ \tt{ \huge{Solution\colon}}}

{ \rm{ \underline{L.H.S}}}

 { \rm{{  =  \dfrac{cos\: A}{1 -  \dfrac{sin \: A}{cos\: A} } +  \dfrac{sin \: A}{1 -  \dfrac{cos\: A}{sin \: A} } }}}

 { \rm{{  =  \dfrac{cos\: A}{  \dfrac{cos\: A - sin \: A}{cos\: A} } +  \dfrac{sin \: A}{  \dfrac{sin \: A - cos\: A}{sin \: A} } }}}

 { \rm{ = \dfrac{ {cos}^{2} A}{cos \:A - sin \:A}  +  \dfrac{ {sin}^{2}A}{sin \:A -cos \:  A}  }}

 { \rm{ = \dfrac{ {cos}^{2} A}{cos \:A - sin \:A}   -  \dfrac{ {sin}^{2}A}{cos \:A -sin \:  A}  }}

{ \rm{  = \dfrac{ {cos}^{2} A - {sin}^{2} A}{cos \: A - sin \: A} }}

{ \rm{ =  \dfrac{(cos \:  A+sin \: A).(cos \: A  - sin \: A)}{(cos \: A  - sin \: A)} }}

{ \rm{  =  cos \: A   +  sin \: A}}

{ \rm{ \therefore \: L.H.S = R.H.S}}

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